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PDF MAX1535 Data sheet ( Hoja de datos )
| Número de pieza | MAX1535 | |
| Descripción | Highly Integrated Level 2 Smbus Battery Charger | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-2848; Rev 0; 4/03
EVAALVUAAILTAIOBNLEKIT
Highly Integrated Level 2 SMBus
Battery Charger
General Description
The MAX1535 is a highly integrated, multichemistry bat-
tery charger that simplifies construction of advanced
smart chargers with a minimum number of external com-
ponents. It uses Intel’s system management bus
(SMBus) to control the charge voltage, charge current,
and the maximum current drawn from the AC adapter.
High efficiency is achieved through use of a constant off-
www.DataSheetitm4Ue.csotemp-down topology with synchronous rectification.
In addition to support of the Smart Battery Charger
Specifications Rev 1.1, the MAX1535 includes addition-
al features. The maximum current drawn from the AC
adapter is programmable to avoid overloads when sup-
plying the load and the battery charger simultaneously.
This enables the user to reduce the cost of the AC
adapter. The MAX1535 provides a digital output that
indicates the presence of an AC adapter. Based on the
presence or absence of the AC adapter, the MAX1535
automatically selects the appropriate source for supply-
ing power to the system by controlling two external P-
channel MOSFETs. Under system control, the MAX1535
allows the battery to undergo a relearning or condition-
ing cycle in which the battery is completely discharged
through the system load and then recharged.
The MAX1535 is capable of charging 2, 3, or 4 lithium-
ion (Li+) cells in series, providing charge currents as
high as 8A. The DC-to-DC converter in the MAX1535
uses a high-side P-channel switch with an N-channel
synchronous rectifier. The charge current and input cur-
rent-limit sense amplifiers have low input-offset errors
and can use small-value sense resistors (0.01Ω, typ).
The MAX1535 is available in a 5mm x 5mm 32-pin thin
QFN package and operates over the extended -40°C to
+85°C temperature range. An evaluation kit is available
to reduce design time.
Applications
Notebook and Subnotebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries
Features
o Compliant with Level 2 Smart Battery Charger
Specifications Rev 1.1
o Intel SMBus 2-Wire Serial Interface
o ±0.5% Charge-Voltage Accuracy
o 11-Bit Charge-Voltage Resolution
o ±3% Input Current-Limit Accuracy
o Uses Small (10mΩ) Current-Sense Resistors
o 8A Maximum Charge Current
o 6-Bit Input and Charge-Current Resolution
o 8V to 28V Input Voltage Range
o 175s Charge Safety Timer
o Automatic Selection of System Power Source
o Charges Any Battery Chemistry (Li+, NiCd, NiMH,
Lead Acid, etc.)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX1535ETJ -40°C to +85°C 32 Thin QFN (5mm x 5mm)
TOP VIEW
Pin Configuration
32 31 30 29 28 27 26 25
DCIN 1
LDO 2
ACIN 3
REF 4
GND 5
CCS 6
CCI 7
CCV 8
MAX1535
24 DLOV
23 DLO
22 PGND
21 CSIP
20 CSIN
19 BATT
18 GND
17 I.C.
9 10 11 12 13 14 15 16
THIN QFN (5mm x 5mm)
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
Highly Integrated Level 2 SMBus
Battery Charger
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VDD = 3.3V, ACIN = PGND = GND, LDO = DLOV,
VMAX = IMAX = REF, CLDO = 1µF, CDHIV = 0.1µF, CREF = 1µF, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless other-
wise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
PDL-to-PDS Switchover Time in
Relearn Mode
PDS and PDL are unloaded
4 10 16 µs
www.DataSheeMt4UA.XcIoMmUM CHARGE-VOLTAGE SETTING
VBATT to VVMAX Ratio
VMAX Input Voltage Range
VMAX Input Bias Current
0 < VVMAX < VREF
MAXIMUM CHARGE-CURRENT SETTING
ICHARGE to VIMAX Ratio
IMAX Input Voltage Range
IMAX Input Bias Current
THERMISTOR COMPARATOR
0 < VIMAX < VREF
Thermistor Overrange Threshold VDD = 2.7V to 5.5V, THM falling
Thermistor Cold Threshold
VDD = 2.7V to 5.5V, THM falling
Thermistor Hot Threshold
VDD = 2.7V to 5.5V, THM falling
Thermistor Underrange
Threshold
VDD = 2.7V to 5.5V, THM falling
4.5 5.0 5.5 V/V
0
VREF
V
1 µA
4 5 6 A/V
0
VREF
V
1 µA
89.5 91 92.5 % of VDD
73.5 75 76.5 % of VDD
21.5 23 24.5 % of VDD
3.5 5 6.5 % of VDD
Thermistor Comparator
Hysteresis
All four comparators, VDD = 2.7V to 5.5V
50 mV
SMBus INTERFACE LEVEL SPECIFICATIONS (VDD = 2.7V TO 5.5V)
SDA/SCL Input Low Voltage
VDD = 2.7V to 5.5V
SDA/SCL Input High Voltage
VDD = 2.7V to 5.5V
SDA/SCL Input Bias Current
SDA, INT Output Sink Current
VDD = 2.7V to 5.5V
VSDA = 0.4V
INT Output High Leakage Current VINT = 5.5V
INT Output Low Voltage
IINT = 1mA
SMBus TIMING SPECIFICATIONS (VDD = 2.7V TO 5.5V)
SMBus Frequency
SMBus Free Time
0.8 V
2.1 V
-1 +1 µA
6 mA
1 µA
25 200 mV
10 100 kHz
4.7 µs
Start Condition Setup Time from
SCL
4 µs
Start Condition Hold Time from
SCL
4.7 µs
Stop Condition Setup Time from
SCL
SDA Hold Time from SCL
SDA Setup Time from SCL
SCL Low Timeout
(Note 1)
4 µs
300 ns
250 ns
25 35 ms
_______________________________________________________________________________________ 5
5 Page 
Highly Integrated Level 2 SMBus
Battery Charger
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VDCIN = 20V, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. CHARGE CURRENT
(CONSTANT-CURRENT MODE)
100
90
www.DataSheet4U.com
80
70
60
VCHARGE = 8.4V
VCHARGE = 12.6V
VCHARGE = 16.8V
50
40
0
246
CHARGE CURRENT (A)
8
CHARGE-CURRENT ACCURACY
5.0
2.5
0
FREQUENCY vs. VIN - VBATT
600
500
400
300
200
100
0
0 4 8 12 16 20
VIN - VBATT (V)
INPUT-CURRENT ACCURACY
2.5
0
-2.5
CHARGE-VOLTAGE ACCURACY
1.0
0.5
0
-0.5
-1.0
4
8 12 16
CHARGEVOLTAGE() CODE (V)
20
INPUT/CHARGE CURRENT
vs. SYSTEM LOAD CURRENT
8
CHARGECURRENT() = 4A
INPUTCURRENT() = 6A
6
INPUT CURRENT
4
-2.5
-5.0
0
-5.0 2
246
CHARGECURRENT() SETTING (A)
8
-7.5
0
2 4 6 8 10
INPUTCURRENT() SETTING (A)
12
CHARGE CURRENT
0
0246
SYSTEM LOAD CURRENT (A)
MAXIMUM CHARGE VOLTAGE vs. IMAX
10
MAXIMUM CHARGE CURRENT vs. VMAX
20
8
8 16
6 12
4
SLOPE ≈ 5V/V
2
8
SLOPE ≈ 5A/V
4
0
012345
IMAX VOLTAGE (V)
0
012345
VMAX VOLTAGE (V)
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX1535.PDF ] | |
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